Semiconductor Principles MCQs

Question 1

Atoms that normally have three electrons in their outer shell are called __________________ atoms.

Accepted Answer

trivalent

Answer

pentavalent

Answer

tetravalent

Answer

charged

Question 2

Reverse bias is a condition that essentially ___________ current through the diode.

Accepted Answer

prevents

Answer

allows

Answer

increases

Answer

blocks

Question 3

Intrinsic semiconductor material is characterized by a valence shell of how many electrons?

Accepted Answer

4

Answer

1

Answer

2

Answer

6

Question 4

Ionization within a P-N junction causes a layer on each side of the barrier called the:

Accepted Answer

depletion region

Answer

junction

Answer

barrier voltage

Answer

forward voltage

Question 5

What is the most significant development in electronics since World War II?

Accepted Answer

the development of the transistor

Answer

the development of color TV

Answer

the development of the diode

Answer

the development of the TRIAC

Question 6

What causes the depletion region?

Accepted Answer

diffusion

Answer

doping

Answer

barrier potential

Answer

ions

Question 7

What is an energy gap?

Accepted Answer

the space between two orbital shells

Answer

the energy equal to the energy acquired by an electron passing a 1 V electric field

Answer

the energy band in which electrons can move freely

Answer

an energy level at which an electron can exist

Question 8

When and who discovered that more than one transistor could be constructed on a single piece of semiconductor material:

Accepted Answer

1959, Robert Noyce

Answer

1949, William Schockley

Answer

1955, Walter Bratten

Answer

1960, John Bardeen

Question 9

When is a P-N junction formed?

Accepted Answer

the point at which two opposite doped materials come together

Answer

in a depletion region

Answer

in a large reverse biased region

Answer

whenever there is a forward voltage drop